<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title></title>
  <style>
    body {
      margin: 0;
      width: 100vw;
      height: 100vh;
    }
  </style>
</head>
<body contextmenu="testmenu">
  <menu type="context" id="testmenu">
    <menuitem label="Test Context Menu Click" id="menuitem"></menuitem>
    <hr>
  </menu>
</body>
</html>
